Normal Operation
The driver seat control switch is powered by battery voltage on circuit SBB14 (BN/RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recline motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor or power recline motor, which moves the seat or backrest in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). There is an additional motor in the power recline mechanism to move the seat backrest forward and rearward. If a new seat track motor needs to be installed, it is necessary to install an entire power seat track. The power recline motor is serviced separately.
The driver seat control switch is powered by battery voltage on circuit SBB14 (BN/RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new seat track motor needs to be installed, it is necessary to install an entire power seat track.
The passenger seat control switch is powered by battery voltage on circuit SBB10 (YE/RD) and is supplied ground on circuit GD151 (BK/GN). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new seat track motor needs to be installed, it is necessary to install an entire power seat track.
The power seat movement should be smooth and the seat cushion should not rock during or after operation.
The power seat should move quietly during operation. Some noise is acceptable.
The power seat should travel fully horizontal (forward/rearward) and vertical (front up/down and rear up/down).
The driver seat control switch is powered by battery voltage on circuit SBB14 (BN/RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor or power recliner motor, which moves the seat or backrest in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). There is an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new seat track motor needs to be installed, it is necessary to install an entire power seat track. The power recline motor is serviced separately.
The driver seat control switch is powered by battery voltage on circuit SBB14 (BN/RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new motor needs to be installed, it is necessary to install an entire power seat track.
The driver seat control switch is powered by battery voltage on circuit SBP01 (RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies the voltage and ground to the applicable driver seat module (DSM) inputs. The DSM then supplies voltage and ground to the appropriate power seat track motor or power recline motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM inputs, and the DSM likewise reverses polarity of the appropriate power seat track motor or power recliner motor circuits causing the seat or backrest to move in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat backrest power recliner mechanism uses a single motor to move the seat backrest forward and rearward.
Battery voltage is also supplied to DSM on circuit SBP01 (RD) and SBB14 (BN/RD). Ground is supplied to the DSM on circuits GD133 (BK) and GD143 (BK/OG).
Each motor, in the memory power seat track and power recliner mechanism contains a Hall-effect position sensor. The DSM supplies a signal feed circuit to each position sensor and a shared reference signal return circuit. Each position sensor sends a signal voltage back to the DSM used to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory SET switch or a remote entry transmitter. Refer to Principles of Operation or the owner's literature for additional information on programming the DSM for storing memory seat positions.
The following pinpoint test diagnoses a memory seat that does not operate in one or more directions when using the seat control switch. If the memory seat moves in all directions using the seat control switch, go to Pinpoint Test J .
The driver seat control switch is powered by battery voltage on circuit SBP01 (RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies the voltage and ground to the applicable driver seat module (DSM) inputs. The DSM then supplies voltage and ground to the appropriate power seat track motor or power recline motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM inputs, and the DSM likewise reverses polarity of the appropriate power seat track motor or power recliner motor circuits causing the seat or backrest to move in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat backrest power recliner mechanism uses a single motor to move the seat backrest forward and rearward.
Battery voltage is also supplied to DSM on circuit SBP01 (RD) and SBB14 (BN/RD). Ground is supplied to the DSM on circuits GD133 (BK) and GD143 (BK/OG).
Each motor, in the memory power seat track and power recliner mechanism contains a Hall-effect position sensor. The DSM supplies a signal feed circuit to each position sensor and a shared reference signal return circuit. Each position sensor sends a signal voltage back to the DSM used to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory SET switch or a remote entry transmitter. Refer to Principles of Operation or the owner's literature for additional information on programming the DSM for storing memory seat positions.
The following pinpoint test diagnoses a memory seat that does not operate correctly using the memory SET switch. If the memory seat does not move in all directions using the seat control switch, go to Pinpoint Test I .
The DSM receives a key out command over the MS-CAN communication network and powers the driver seat rearward about 2 inches.
The passenger seat control switch is powered by battery voltage on circuit SBB10 (YE/RD) and is supplied ground on circuit GD151 (BK/GN). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new motor needs to be installed, it is necessary to install an entire power seat track.
The driver and passenger heated seats share a common ignition and battery feed to the heated seat control switch assembly. The ignition feed circuit CBP18 (GY/OG) powers the logic board and illumination of the heated seat switch assembly and the battery feed circuit SBB28 (GN/RD) is used to provide voltage to the heater mats. The heated seat switch assembly uses shared ground GD145 (BK/BU) for the logic board and illumination.
When a heated seat switch is pressed with the ignition switch in RUN or START, a momentary ground is provided to the logic board of the heated seat switch assembly. The logic board then activates an internal relay in the heated seat switch assembly that provides voltage via circuit CHS02 (YE/BU) (driver seat) or CHS07 (GY/BU) (front passenger seat) to the bi-metallic thermostat that is part of the seat cushion heater mat.
The driver seat cushion and backrest heater mats are wired in series as are the passenger seat cushion and backrest heater mats. The heated seat system is designed to maintain the temperature by the opening (no voltage to the heated seat elements) and closing (voltage supplied to the heated seat elements) of the bi-metallic thermostat.
The driver and passenger heated seats share a common ignition and battery feed to the heated seat control switch assembly. The ignition feed circuit CBP18 (GY/OG) powers the logic board and illumination of the heated seat switch assembly and the battery feed circuit SBB28 (GN/RD) is used to provide voltage to the heater mats. The heated seat switch assembly uses shared ground GD145 (BK/BU) for the logic board and illumination.
When a heated seat switch is pressed with the ignition switch in RUN or START, a momentary ground is provided to the logic board of the heated seat switch assembly. The logic board then activates an internal relay in the heated seat switch assembly that provides voltage via circuit CHS02 (YE/BU) (driver seat) or CHS07 (GY/BU) (front passenger seat) to the bi-metallic thermostat that is part of the seat cushion heater mat.
The driver seat cushion and backrest heater mats are wired in series as are the passenger seat cushion and backrest heater mats. The heated seat system is designed to maintain the temperature by the opening (no voltage to the heated seat elements) and closing (voltage supplied to the heated seat elements) of the bi-metallic thermostat.
The seat control switch is powered by battery voltage on circuit SBB14 (BN/RD) (power seat) or SBP01 (RD) (memory seat) and is supplied ground on circuit GD133 (BK). When the knob of the seat control switch is pressed, voltage and ground are supplied to the power lumbar motor. When pressing the lumbar knob in the opposite direction, the lumbar control switch reverses the polarity to the power lumbar motor, which moves the lumbar mechanism in the opposite direction.
The third row power-fold seat relay is supplied battery voltage on circuit SBB12 (GN/RD) (right) and SBB05 (GY/RD) (left) and is hot at all times. The ground is supplied to each third row power-fold seat relay on the coil side through circuit CPS48 (BU) and controlled by the smart junction box (SJB). The power fold seat relays will be provided ground on the coil side from the SJB for 30 minutes when the transmission selector is in PARK, and the liftgate, or liftgate glass, is open. The ground will be disabled 30 minutes after turning the vehicle off. If the ground is disabled after 30 minutes, the ground can be enabled by opening any door, pressing the unlock key on the key fob, pressing any keyless keypad button or turning the ignition key.
The left third row power-fold seat relay coil side is supplied battery voltage on circuit SBB05 (GY/RD) and is hot at all times. The ground is supplied to each third row power-fold seat relay on the coil side through circuit CPS48 (BU) and controlled by the smart junction box (SJB). When the left third row power-fold seat switch is pressed, voltage is supplied through the switch side of the left third row power-fold seat relay on circuit SBB05 (GY/RD) and supplied ground on circuit GD149 (BK/GY). When pressing the left third row power-fold seat switch in the opposite direction, the left third row power-fold seat switch reverses the polarity to the left third row power-fold seat motor, which moves the third row seat backrest in the opposite direction.
The right third row power-fold seat relay coil side is supplied battery voltage on circuit SBB12 (GN/RD) and is hot at all times. The ground is supplied to the right third row power-fold seat relay on the coil side through circuit CPS48 (BU) and controlled by the smart junction box (SJB). When the right third row power-fold seat switch is pressed, voltage is supplied through the switch side of the left third row power-fold seat relay on circuit SBB12 (GN/RD) and supplied ground on circuit GD149 (BK/GY). When pressing the right third row power-fold seat switch in the opposite direction, the right third row folding seat switch reverses the polarity to the right third row folding seat motor, which moves the third row seat backrest in the opposite direction.
When the recliner handle is turned, it releases the outboard recliner. This also turns a gear drive in the outboard recliner, resulting in the recliner release shaft turning in the opposite direction of the recliner handle. When the recliner release shaft is turned, it releases the inboard recliner. This allows the backrest to fold down.
When the backrest is down, there are 2 safeties that prevent the backrest from being positioned upright (vertical) under 2 different conditions. The first condition is if the latch feet are not completely latched around the mounting plate strikers. When this happens, the cable attached to the latch feet assembly outboard latch foot holds the outboard recliner outer lock out lever back, engaging the safety, preventing the backrest from being positioned upright (vertical) and locking in position. The second condition is if the kneeling mechanism is not completely locked in the standing (upright) position. When this happens, the cable attached to the kneeling mechanism inboard leg lever holds the outboard recliner inner lock out lever back, engaging the safety, preventing the backrest from being positioned upright (vertical).
If the backrest is not folded forward and all the way down, the seat will not kneel or go up into the E-Z entry position. The backrest cannot be returned to the upright (vertical) position until the kneeling mechanism is returned to the standing (upright) position and the latch feet assembly is latched to the mounting plate strikers.
This pinpoint test is intended to diagnose the following
- Recliner handle or loose screw
- Inboard recliner
- Outboard recliner
- Cable assembly routing
- Cable assembly
- Kneeling mechanism release handle and cable
- Kneeling mechanism
- Latch feet assembly
- Recliner release shaft
- Cushion frame
When the recliner handle is turned, it releases the outboard recliner. This also turns a gear drive in the outboard recliner, resulting in the recliner release shaft turning in the opposite direction of the recliner handle. When the recliner release shaft is turned, it releases the inboard recliner. This allows the backrest to fold down.
When the backrest is down, there are 2 safeties that prevent the backrest from being positioned upright (vertical) under 2 different conditions. The first condition is if the latch feet are not completely latched around the mounting plate strikers. When this happens, the cable attached to the latch feet assembly outboard latch foot holds the outboard recliner outer lock out lever back, engaging the safety, preventing the backrest from being positioned upright (vertical) and locking in position. The second condition is if the kneeling mechanism is not completely locked in the standing (upright) position. When this happens, the cable attached to the kneeling mechanism inboard leg lever holds the outboard recliner inner lock out lever back, engaging the safety, preventing the backrest from being positioned upright (vertical).
If the backrest is not folded forward and all the way down, the seat will not kneel or go up into the E-Z entry position. The backrest cannot be returned to the upright (vertical) position until the kneeling mechanism is returned to the standing (upright) position and the latch feet assembly is latched to the mounting plate strikers.
This pinpoint test is intended to diagnose the following
- Recliner handle or loose screw
- Outboard recliner
- Cable assembly
- Latch feet retracting link
- Latch feet assembly
- Mounting plate
When the recliner handle is turned, it releases the outboard recliner. This also turns a gear drive in the outboard recliner, resulting in the recliner release shaft turning in the opposite direction of the recliner handle. When the recliner release shaft is turned, it releases the inboard recliner. This allows the backrest to fold down.
When the backrest is down, there are 2 safeties that prevent the backrest from being positioned upright (vertical) under 2 different conditions. The first condition is if the latch feet are not completely latched around the mounting plate strikers. When this happens, the cable attached to the latch feet assembly outboard latch foot holds the outboard recliner outer lock out lever back, engaging the safety, preventing the backrest from being positioned upright (vertical) and locking in position. The second condition is if the kneeling mechanism is not completely locked in the standing (upright) position. When this happens, the cable attached to the kneeling mechanism inboard leg lever holds the outboard recliner inner lock out lever back, engaging the safety, preventing the backrest from being positioned upright (vertical).
If the backrest is not folded forward and all the way down, the seat will not kneel or go up into the E-Z entry position. The backrest cannot be returned to the upright (vertical) position until the kneeling mechanism is returned to the standing (upright) position and the latch feet assembly is latched to the mounting plate strikers.
This pinpoint test is intended to diagnose the following
- Kneeling mechanism release handle and cable
- Kneeling mechanism